ellos creerían

would believe

→ creer
creer to believe + ían 3rd-person plural conditional
verb · 3rd-person plural Rare #55,448
would believe
SP: Me creerían si les dijera la verdad.
EN: They would believe me if I told them the truth.
Conjugation of creer
Conditional
SingularPlural
First creería —
Second creerías —
Third creería creerían

No lo creerían si les digo el provecho que le sacó.

You wouldn't believe it if I told you how much he benefited from it.

— Sueño de fuga (1994)

Yo no pensé que ustedes me creerían.

I didn’t think you guys would believe me.

Porque si dijera eso sus padres lo creerían.

Because if he said that, his parents would believe it.

— Masaan 2015 (2015)

Bueno, pensé que no me creerían.

Well, I thought they wouldn’t believe me.

— Los renglones torcidos de Dios (2022)